Snow-plow



(No Model.) Sheets-Sheet 1. J. OORBETT.

SNOW PLOW.

No. 404,173. Patented May 28, 1889.

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- A770 IVEYS.

2 Sheets-Sheet 2.

(No Model.)

J. OORBBTT.

snow PLOW.

No. 404,173. Patented May 28, 1889.

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WITNESSES:

UNITED STATES ATENT OFFICE.

JOSEPH CORBETT, OF NE\V YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

CHARLES H. OTIS, OF BROOKLYN, NElV YORK. a

SNOW- PLOW.

SPECIFICATION forming part of Letters Patent No. 404,173, dated May 28, 1889. Application filed November 16, 1888. Serial No. 291,004. (No model.)

To all whom it may concern:

Be it known that I, JOSEPH CORBETT, of the city, county, and State of New York, have invented certain new and useful Improvements in Snow-Flows, of which the following is a specification.

This invention relates to improvements in snow-plows of that class in which a revoluble head provided with blades or cutters is em- IO ployed for cutting into the snow and throwing it sidewise out of the path of the plow, the invention relating more especially to certain improvements on the snow-plow for which an application for patent was filled by me on February 13, 1888, Serial No. 263,761.

This invention consists of the new combinations and arrangements of parts hereinafter more fully pointed out.

In the accompanying drawings, Figure 1 represents a side elevation of my improved snow-plow, shown as applied to the head of truck-frame. Fig. 2 is avertical longitudinal section of the same, drawn on a larger scale. Fig. 3 is a front elevation; and Fig. 4c, a ver- 2 5 tical transverse section on line 00 r, Fig. 2.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents a truck-frame on which is supported, in suitable 3o bearings, a, a longitudinal shaft, 13, to the front end of which, at the head of the truckframe, is applied a conical head, 0. Rotary mot-ion is imparted to the shaft by a suitable transmitting gearing from a motor-engine,

3 5 which is located on the truck-frame, but not shown in the drawings. The conical head 0 is provided with a number of spiral blades, D D, which increase in width from the point 1) toward the base of the head, so as to form a point in the nature of an auger-point. Every third blade D is extended in gradually-diminishing convolutions to the point of the head 0, while intermediate spiral blades, D, are not extended to the point of the head, but are made shorter, so as to provide between the blades an additional number of grooves, which take up snow cut up by the point and move the same in the gradually-widening grooves or spaces between the blades toward the base of the head 0. The spiral blades D D are bent at their outer ends and near the base of the head into the shape of straight wings D which extend radially to the axis of the head parallel therewith, like the paddles of a paddle-wheel. The radial wings or paddles D are surrounded by a cylindrical casing, E, which is provided at the top part with an opening, 6, having a curved hood, E, through which the snow is forced by the centrifugal force exerted thereon by the paddles and thrown to the outside of the casing sidewise of the track. The casin g E is provided with a forwardly-extending and outwardly-flaring portion, E which is recessed at the bottom part between the track, said flaring portion cutting up the snow andconducting the same toward the spiral blades of the head, by which the snow is taken up, carried by centrifugal force in spiral slices along the blades until the radial wings or paddles act upon the same and throw it through the top opening and hood to the outside of the casing. The wings or paddles D are connected at the base of the head by a disk-shaped flange, (Z, which closes the casing around the base of the head, said 7 5' flange serving as a deflector for the snow, so

as to conduct it toward the top hood and to the outside. The cylindrical casing E is braced at its rear by a strong frame, so as to resist the strain exerted therein by the weight of the snow passing along the blades of the head and to the outside of the casing. The recessed bottom part of the flaring front portion, E of the casing permits the blades D D to scoop up' the snow between the track immediately below the rotating head and 40 move it backward to the paddles D The rapidly-rotating conical head O and the spiral blades terminating near its point screws like an anger into the snow, cuts the same into slices, and moves them from a state of rest at the point with gradually-increasing velocity along the spiral blades toward the Wings or paddles at the base of the head, Where the velocity of the snow is. still more accelerated and the snow thrown by centrifugal force to the outside of the casing, so that the snow-plow is capable of removing a large quantity of snow with a considerable economy of power, the removal being accom- Ioo plished by a comparatively simple, strong, and effective construction of the cutter-head. The snow-plow is coupled in front of the locomotive and pushed forward by the same in the usual manner. It can also be built on a smaller scale for removing the snow from the tracks of street-railways, and constructed as a hand-plow for removing the snow from the sidewalks.

Having thus described my invention, I claim as new and desire to secure by Letters Patcnt- 1. In a snow-plow, a revoluble conical head provided with spiral blades increasing in I 5 width from the point toward the base of the head, and with alternating shorter blades that are not extended to the point of the head, substantially as set forth.

2. In a snow-plow, a revoluble conical head having a number of spiral blades increasing in width from the point toward the base of the head and bent into wings or paddles near the base of the head, substantially as set forth. 3. In a snow-plow, a conical revolublehead 2 5 provided with a number of spiral blades increasing in width from the point toward the base of the head and bent at the base into wings or paddles radial to and parallel with the axis of the head, substantially as set forth. et. In a snow-plow, a conical revoluble head provided with a number of spiral blades increasing in width from the point toward the base of the head and bent into the shape of radial wings or paddles near the base of the 5 head, said wings being connected by a circumferential flange at the base of the head, substantially as set forth.

The combination of a revoluble conical head having spiral blades diminishing in width toward the point of the head and forming radial wings or paddles at the base of the same, with a cylindrical casin provided with a flaring front portion and with a dischargeaperture and hood at the top, substantially as set forth.

6. The combination of a conical. revoluble head having spiral cutter-blades diminishing in width toward the point of the head and bent into radial wings or paddles at the base of the same, a circumferential flange connecting the wings or paddles, and a cylindrical easing surroundiu g the paddles and provided with a top opening and hood and with a'flaring front portion recessed at the lower part, substantially as set forth.

7. In a snow-plow,a conical rcvoluble head provided with spiral blades of increasing width and wing-shaped ends for lifting and throwing off the snow by centrifugal force, substantially as set forth.

8. In a snow-plmv, a conical revoluble head provided with spirally-curved blades which terminate in an auger-shaped point at the apex and in paddles or wings at the base of the head, substantially as set forth.

In testin'lony that I. elaiin the foregoing as my invention I have signed my name in pres once of two subscribing witnesses.

15m n (1 on rnii, CARL KA'RP. 

